package lan;

public class 窗口 {
    public static void main(String[] args) {
        String astring="ABDECDNBAC";
        int[] start=new int[2];
        int[] end=new int[2];
        int j,k=0;
        for (int i = 0; i <astring.length(); i++) {
            if(astring.charAt(i)=='A'||astring.charAt(i)=='B'||astring.charAt(i)=='C'){

            }
        }
    }
}
